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function getChildNodes(obj,para,type)
{
var parent;
//定义子集;
var children=new Array;
para=!para?'':para;
type=!type?'':type;
//取父集
if (typeof(obj)=="object")
{
parent=obj;
}
else
{
parent=document.getElementById(obj);
if (!parent )
{
parent=document.getElementsByName(obj);
}
}
children=parent.childNodes;
if (!children)
{
return 0;
}
if (para==''&&type=='')
{
return children;
}
else
{
for (i=0;i<children.length;i++)
{
if (children[i].type)
{
if (children[i].type.toLowerCase()==para)
{
return children[i];
}
}
else
{
return children[i].type;
}
}
}
}